Study of work roll edge contact in asymmetrical rolling by modified influence function method

Work roll edge contact affects mechanics of asymmetrical rolling and crown of the rolled strip significantly, which has not been quantified before. In this paper, a modified influence function method model has been developed based on the deformation compatibility between the backup roll and work roll, the work roll and strip and the two work rolls when the work roll speeds of the upper and lower work roll are different. The rolling force, intermediate force, roll edge contact force and the edge contact length for asymmetrical rolling of strip are focused. The calculated rolling force, crown of the rolled strip and the edge contact length are compared for various rolling conditions. The effects of reduction and friction on crown of the rolled strip are also discussed.